Opus number in the context of "The Sleeping Beauty Ballet"

Ludwig van Beethoven (baptised 17 December 1770 – 26 March 1827) was a German composer and pianist. One of the most revered figures in the history of Western music, his works rank among the most performed of the classical music repertoire and span the transition from the Classical period to the Romantic era. Beethoven's early period, during which he forged his craft, is typically considered to have lasted until 1802. From 1802 to around 1812, his middle period showed an individual development from the styles of Joseph Haydn and Wolfgang Amadeus Mozart, and is sometimes characterised as heroic. During this time, Beethoven began to grow increasingly deaf. In his late period, from 1812 to 1827, he extended his innovations in musical form and expression.

Born in Bonn, Beethoven displayed his musical talent at a young age. He was initially taught intensively by his father, Johann van Beethoven, and later by Christian Gottlob Neefe. Under Neefe's tutelage in 1783, he published his first work, a set of keyboard variations. He found relief from a dysfunctional home life with the family of Helene von Breuning, whose children he loved, befriended, and taught piano. At age 21, he moved to Vienna, which subsequently became his base, and studied composition with Haydn. Beethoven then gained a reputation as a virtuoso pianist, and was soon patronised by Karl Alois, Prince Lichnowsky for compositions, which resulted in his three Opus 1 piano trios (the earliest works to which he accorded an opus number) in 1795.

The Piano Sonata No. 28 in A major, Op. 101, by Ludwig van Beethoven was composed in 1816 and published in 1817. Dedicated to the pianist Baroness Dorothea Ertmann, née Graumen, it is considered the first of the composer's late piano sonatas.

This sonata marks the beginning of what is generally regarded as Beethoven's final period, where the forms are more complex, ideas more wide-ranging, textures more polyphonic, and the treatment of the themes and motifs even more sophisticated than before. Op. 101 well exemplified this new style, and Beethoven exploits the newly expanded keyboard compass of the day.

The Symphony No. 9 in D minor, Op. 125, is a choral symphony, the final complete symphony by Ludwig van Beethoven, composed between 1822 and 1824. It was first performed in Vienna on 7 May 1824. The symphony is regarded by many critics and musicologists as a masterpiece of Western classical music and one of the supreme achievements in the history of music. One of the best-known works in common practice music, it stands as one of the most frequently performed symphonies in the world.

The Ninth was the first example of a major composer scoring vocal parts in a symphony. The final (4th) movement of the symphony, commonly known as the Ode to Joy, features four vocal soloists and a chorus in the parallel key of D major. The text was adapted from the "An die Freude (Ode to Joy)", a poem written by Friedrich Schiller in 1785 and revised in 1803, with additional text written by Beethoven. In the 20th century, an instrumental arrangement of the chorus was adopted by the Council of Europe, and later the European Union, as the Anthem of Europe.

Hermann and Dorothea is an epic poem, an idyll, written by German writer Johann Wolfgang von Goethe between 1796 and 1797, and was to some extent suggested by Johann Heinrich Voss's Luise, an idyll in hexameters, which was first published in 1782–1784. Goethe's work is set around 1792 at the beginning of the French Revolutionary Wars, when French forces under General Custine invaded and briefly occupied parts of the Palatinate. The hexameters of the nine cantos are at times irregular.

With the poem as his source, Robert Schumann composed an overture in B minor entitled Hermann and Dorothea, his Op. 136. The overture dates from 1851.

A march is a musical composition with a strong regular rhythm which in origin was expressly written for lockstep marching of soldiers. As a musical genre, it is a type of martial music, most frequently performed by a military band during parades.

March music pieces vary widely in mood, ranging from the emotional funeral march in Wagner's Götterdämmerung to the brisk Romantic marches of John Philip Sousa and the militaristic hymns of the late 19th century. Examples of the varied use of the march can be found in Beethoven's Eroica Symphony, in the Marches Militaires of Franz Schubert, in the Marche funèbre in Chopin's Sonata in B flat minor, the "Jäger March" in the Op. 91a by Jean Sibelius, and in the Dead March in Handel's Saul.

Der Freischütz (J. 277, Op. 77 The Marksman or The Freeshooter) is a German opera with spoken dialogue in three acts by Carl Maria von Weber with a libretto by Friedrich Kind, based on a story by Johann August Apel and Friedrich Laun from their 1810 collection Gespensterbuch. It premiered on 18 June 1821 at the Schauspielhaus Berlin. It is considered the first German Romantic opera.

The opera's plot is mainly based on August Apel's tale "Der Freischütz" from the Gespensterbuch though the hermit, Kaspar and Ännchen are new to Kind's libretto. That Weber's tunes were just German folk music is a common misconception. Its unearthly portrayal of the supernatural in the famous Wolf's Glen scene has been described as "the most expressive rendering of the gruesome that is to be found in a musical score".

Capriccio espagnol, Op. 34, is the common Western title for a five movement orchestral suite, based on Spanish folk melodies, composed by the Russian composer Nikolai Rimsky-Korsakov in 1887. It received its premiere on 31 October 1887, in St. Petersburg, performed by the Imperial Orchestra conducted by the composer. Rimsky-Korsakov originally intended to write the work for a solo violin with orchestra, but later decided that a purely orchestral work would do better justice to the lively melodies. The Russian title is Каприччио на испанские темы (literally, Capriccio on Spanish Themes).

Russian Easter Festival Overture: Overture on Liturgical Themes (Russian: Светлый праздник, romanized: Svetly prazdnik, lit. 'Bright festival'), Op. 36, also known as the Great Russian Easter Overture, is a concert overture written by the Russian composer Nikolai Rimsky-Korsakov between August 1887 and April 1888. It was dedicated to the memories of Modest Mussorgsky and Alexander Borodin, two members of the group of composers known in English as "The Five". It is the last of what many call his three most exceptionally brilliant orchestral works, preceded by Capriccio Espagnol and Scheherazade. The work received its premiere at a Russian symphony concert in St. Petersburg on 15 December [O.S. 3 December] 1888.

Scheherazade, also commonly Sheherazade (Russian: Шехеразада, romanized: Shekherazada, IPA: [ʂɨxʲɪrɐˈzadə]), Op. 35, is a symphonic suite composed by Nikolai Rimsky-Korsakov in 1888 and based on One Thousand and One Nights (also known as The Arabian Nights).

This orchestral work combines two features typical of Russian music in general and of Rimsky-Korsakov in particular: dazzling, colorful orchestration and an interest in the East, which figured greatly in the history of Imperial Russia, as well as Orientalism in general. The name "Scheherazade" refers to the main character Scheherazade of One Thousand and One Nights. It is one of Rimsky-Korsakov's most popular works.